Headset



FIG. 1 is a front view of the headset showing my new design;

FIG. 2 is a back view thereof;

FIG. 3 is a first side view thereof;

FIG. 4 is a second side (opposite to the first side) view thereof;

FIG. 5 is a top plan view thereof; and,

FIG. 6 is a bottom plan view thereof.

The ornamental design for a headset, as shown and described.